Wrench



Ma'r,*3, 1925.

G. GREEN WRENCH Original Filed June 13', 1922 gwuenfor,

' GragZ-G'reen 7 Patented Mar. 3, 1925.

GRANT GREEN, on NEW YORK on NEW YORK,

ASSIGITOR TO THE CRESSINGTON CORPORATION, 15. CORPORATION OF NEW YORK.

W ENCH.

Application filed June 13, 1922, Serial No. 567,949. Renewed July 28,1924.

To all whom it may concern.-

York, in the county of New York and State of New York, have invented newand useful Improvements in Wrenches, of

following is a specification.

This invention re wrenches, and par wrench wherein an adjustable jawisemployed.

The primary object of the inv provide a wrench of such I movablejawmaybe easily and justed to the desired posltion held in such adjustment.

which the lates to improvements in icularly to that type of ormovableention is to character that the quickly ad and firmly A further objectof the invention is to provide a wrench of the character stated whichembodies increased cooperative locking surfaces able :jaw, whereby thelatter is between the shank and movand positivelyagainst any movementwhatever when the saldrnovable aw has once been adjusted and moved to lo,tion

cking posi-v wrench ismdicated at 7 and 18 carried by a Affurther objectof the invention is to provide a wrench of the character stated of turnscrews, adj ustdj ustingor of amore or less featured by the lack mglevers, springs, mamtammg mechanism and other a complex or cumbersomeconstruction heretofore, used in similar dev-icesfor creating ormaintaining-the adjustment of the mov able jaw; the invention hereincontemplated. capable of being released from engagement with thereon byproviding a movable jaw instantl y the shank; so as to be slid freelythe hand of the operator when required,

and which, after the adjustment has been,

made, may be locked rigidly to the said shank, in a simple manner.

.A. further 7 and particular obj ect of the invention isto provide awrench ofthatcharportion thereofis acter wherein'the shank provided witha number of teeth or serrations of the slidable head, the shank thewrench being so serrations may be readily cut to be engaged withcorresp'ondingteeth it portion of constructed that the or formed uponagreat quantity of such shanks at a single operation of the toothcuttingmachine.

With these and other objects inview, the. invention. consists of thefeatures of con-.

. struetion, combination and 'arna ngement of hereinafter fullydescribed and reference being had to the accomwh1ch:

parts, claimed, panying drawing, in

Figure l is a side elevation, parts broken away, of a wrench constructedin accordance with the invention;

Fig. 2 is a rear elevation o wrench;

Fig. 3 is a side elevation of the improved f the improved .Wrench andbody 7' of abreadth or thickness equal to that of the shank 5, saidbody-having spaced strap portions8 to extend around or embrace the shankto permit sliding movement of the head or jaw 7 longitudinally of theshank but to prevent the said adjustable head becoming detached from theshank. The body 7 and strap portions 8 so embrace the shankas to permitof slight lateral move ment of the head or jaw portion 7 relative. tothe said shank, whereby the inneraor shank engaging surface of the saidhead may be moved outof contact with thesaid shankat the proper times;

The adjacent or cooperating gshank and slidable head faces are toothedor serrated as at 9, so that when thesaid faces are engaged with eachother the teethwwillbe interlocked and the shankand-slidablehead againstmovement longitudinally of the shank but capable of moving laterallythere in. This bar when moved outwardly of the channel 11, engages thestrap portions 8 of jaw and causes the latter to move to such extentthat the inner or serrated face thereof contacts with the toothed faceof the shank 5, whereby the cooperating teeth of said elements will beinterlocked. When the block 11 is withdrawn or moved inwardly of thechannel 10, the head 7 is released and may move so as to withdraw itsteeth from engagement with the t eth of shank 5. The means employed forcontrolling the movements of the block or bar 11 includes a lockingstrip 12 disposed in the base of the channel and underlying the block orbar 11. This locking strip is provided at spaced in tervals upon itsouter edge with teeth 13 beveled or inclined on one edge as shown, whichteeth are disposed within notches 14 similarly shaped in the adjacentedge of the block or bar 11. The block or bar 11 is provided at itsextremities with laterally disposed slots 15, through which studs orpins 16 project; the said pins or studs being carried by the shank 5 andextending through the channel 10 therein. The inner end of the lockingstrip 12 has an outwardly extended operating finger 17, the outer edgeof which protrudes slightly beyond the rear face of the shank 5 and maybe roughened or milled to enable the thumb or finger of the wrenchoperator to grip and operate the same. The locking strip 12 carries alaterally disposed pin 18 extending loosely through a slot 19 in theshank 5, the said slot being disposed longitudinally of the shank topermit of limited movement of the said strip longitudinally of theshank.

From the foregoing it is apparent that I have provided a wrench ofextremely simple construction and yet which may be quickly and easilyadjusted so as to lit the element or surface with which it is intendedthat the jaws engage. This adjustment may be easily accomplished bymoving the jaw 7 with the hand after withdrawal of the block or bar 11from engagement with the rearwardly extending straps S of the said head.As soon as the adjustment has been made, the locking strip 12 will bewithdrawn so as to cause the block or bar 11 to move rearwardly and drawthe head 7 so that its teeth will interlock with the teeth 9 of theshank. LlllS act on being created by applying rearward movement to thefinger 17 of the locking strip and causing the projections 13 to rideagainst the inclined surfaces of the notches 14 and force the blockor'bar 11 in an outward direction. Movement of the locking strip in thereverse direction will at once release the block or bar 11 and permit ofthe same being withdrawn from engagement with the straps 8.

It will be noted that the shank is of even thickness throughout itslength, and by reason of this fact a great number of such shanks, priorto the application of heads 7 thereto, may be assembled in a toothcutting machine and properly alined and held ticrein so that a singleoperation of the cutting mechanism will cause a. great number of saidshanks to be toothed.

It will be noted that the body 7 carrying the fixed jaw 7, and thespaced straps 8 of said body, are arranged in rear of the transverseplane of the jaw 7, the straps 8 thus being wholly out of alinement withthe toothed face of said'jaw. This allows the teeth of the jaw to be outthereinto in its process of manufacture without interference from thestraps and also allows a number of such jaws to be assembled and held ina tooth cutting machine, so that the teeth of a plurality of jaws may beout in a single operation. Furthermore, such arrangement of the body 7and spaced straps 8 gives a wide range of supporting surface for themovable aw on the shank, ensuring its firm retention in adjustedposition, and the spaced straps obviate any liability of tilting orcanting of the jaw on the shank. By placing the teeth on a jawconstructed and mounted as described, instead of placing the teeth onthe inner surfaces of the straps, greater ease of manufacture isprovided for in addition to the above-stated advantages.

The handle 20 of the wrench includes a tubular member as shown having aslot or notch 21 at its inner end to receive the out wardly extendingfinger 17 of locking strip 12, and this tubular member is held inposition upon the handle portion of the shank by means of studs orrivets 22 passing through the shank and the tubular handle.

.Vhile the above is a description of the in vention in its preferredembodiment, it is to be understood that various changes in theconstruction and arrangement of parts may be resorted to, if desired,without departing from the spiritof the invent-ion as defined by theclaims. I

Having thus fully described my invention, I claim:

1. In a wrench, the combination of a shank provided with looking teethand a fixed jaw along one of its longitudinal edges and provided in itsopposite edge with a channel, a movable jaw having a strap portionslidably engaging said shank, said movable jaw having teeth to engagethe teeth of the shank and said strap portion being movable laterally ofthe shank to permit the teeth of the shank and movable jaw to be throwninto and out of engagement with each other, a locking bar movablelaterally of the channel and having a slot and pin connection at eachend with the shank to permit of such movement, said her having l'dO anouter plane face for engagement with the strap of the movable jaw andhaving an inner face notched to provide a series of spaced inclinedsurfaces and stop shoulders, a locking strip slidably disposed in thechannel between said bar and the bottom of the channel and having itsouter surface provided with projections having inclined surfaces andstop shoulders for cooperation with the inclined surfaces and stopshoulders of the locking bar, and a finger-piece projecting laterallybeyond the shank at the rear end of said locking strip, said fingerpiecehaving a sliding slot and pin connection with the shank.

2. In a wrench, a shank having parallel longitudinal: edges, teeth onone of said edges, the said shank having a longitudi nally disposedchannel in its rear edge, a

20 bar disposed within said channel and spaced from the base thereof,pins in said shank at the ends of said bar, the said bar in its endshaving laterally disposed slots receiving said pins, the inner face ofsaid bar having notches with inclined walls, a locking strip underlyingsaid bar, projections on said strip extending into the notches of saidbar, inclined walls on said projections cooperating with the similarlyconstructed walls of said recesses, a finger at one end of said stripprojecting beyond the rear surface of said shank, means for maintainingsaid locking strip in position within said channel, a jaw slidable uponsaid shank and having teeth to interengage with the teeth of said shank,straps embracing said shank, and the said straps extending around theouter edge of said block.

In testimony whereof I afiix my signature.

GRANT GREEN.

